Improvement in lamp-burners



R. WETHERILL.

Lamp-Burner.

No. 198,719. Patented Dec. 25,1877,

WITNESSES: 1N VENTOR m 4@M%AT4TORNEKSE NJ'ETmS} WCPLITHOGRAPHEK WASHKNGYON, D, C.

ED STATES PATENT OFFICE}.

ROBERT WETHERILIJ, I on PHILADELPHIA, PENNSYLVANIA.

NIMPROVEMENT'IN LAMP-BURNERS,

Specification forming m of L etters patent No. 198,719. dated December 25, 1877; application filed November 13, 1877. a e

To all whom it may concern: I

Be it known that I, Ronnn'r WETHERILL, of Philadelphia, in the county of Philadelphia and Stateof Pennsylvania, have invented certain new anduseful Improvements in Lamp-Burners; and I do hereby" declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in theart to which it pertains to make and use it, reference being had to the accompanying drawings, which for part of this specification,in which r I e Figure l is a side elevation of a lamp-burner, partly -in section, showing my invention applied thereto. Fig. 2 is a side elevation of the same with my improvement removed therefrom. Fig. 3 is a perspective of my invention. a I a y invention has for its object to prevent disastrous effects resulting from theexplosion of kerosene-oil in lamps; and my improvement consists in forming the burner with an opening for theescape of violently-expandin g gas, said opening being covered by an elastic band, forming avalve, which holdsto its seat with sufficient force resist the static or the d namic pressure of the liquid, but will yield to the pressure of gas when an explosion occurs, as hereinafter more fully set forth.

Referringtothe accompanying drawing, A represents a lamp-burner of the usual or any suitable construction, having a stem, B, adapted to fit the neck of an oil-lamp. G is an opening in said stem, which is, by preference, made in the form of an oblong slot. D is an elastic metal band or ring, which partly surrounds the stem B, so as to clamp thereon and cover the opening 0, and d is a rib or tongue onthe inner side of said ring, exactly fittingthe said opening, so as to form a tight joint.

The springband D clamps the stemfB so tightly as notto be displaced by the pressure of theoil within the lamp-bowl should said liquid be agitated so as to surge or splash as high as the opening 0 when the lamp is moved. l I

Should an explosion of gas within the lampbowl occur from any cause, the sudden and forcible expansion produced thereby will press back the band, uncovering the opening (1, and allowing the free exit of the gas, thus avoiding the breakageof the lamp and other disastrous results. I I I The openingO may be formed in the neck of a lamp and the band D applied thereto, if

desired. I prefer, however, to form such opening in the burner-stem and applythe band to such burner, 'as herein set forth. I What I claim as my invention is 1. The combination, with a burner-stem, B, having. an opening, 0, for the escape of gas, o a valve or cover adapted to open automatically from the pressure of confined gas, and consisting of an elastic band, D, applied to said stemwithout fastening, as shown and described.

2. The elasticband or clamp D, having a .rib or tongue, 61, and forming a tight-fitting attachable to a lamp.

automatic gasvaIve,

without permanent fastening, as shown and set forth. I Y C In testimony that I claim the foregoing I have hereunto set my hand this 10th dayof November, 187 7.

ROBERT WETHERILL. Witnesses f I GEO. (l. SHELMERDINE, M. D. OoNNoLLY. 

